Large ponderosa pines in Northern California show yellowing/browning tops. Two causes: root diseases (slow, gradual thinning over years) or bark beetles (rapid, needles turn red/brown seemingly overnight). If beetles, spray adjacent trees with Onyx on trunks. If roots, fertilize with 10-10-10 at 1 lb per inch trunk diameter to stimulate root growth. Call California State Forestry for a forester to diagnose.
Rescuing Drought-Stressed Pine Trees in Texas
Evaluating Questionable Tree Service Claims About Pine Root Damage
Pine Tree Taproot Depth: Myths and Reality
Cutting One Pine Root for a Deck Foundation: Is It Safe?
Transplanting a Pine Tree: Root Ball Size, Timing, and Aftercare
Diagnosing Sudden Decline in a 45-Year-Old Ponderosa Pine
Southern Yellow Pine (Pinus palustris): The Fire-Resistant Giant of the Southeast
Pine and Spruce Needle Yellowing: Drought Stress, Not Just Fungus
Trenching Near Mature Ponderosa Pine: Root Cutting Assessment
Post Hole Near a 100-Foot Pine: Root Cut Is Harmless
Pine Needle Drop: Normal Seasonal Shedding or Cause for Concern?
Yellowing Needles on a Newly Planted Afghan Pine
Confirming Shortleaf Pine and Measuring DBH Correctly
New Ponderosa Pine Yellowing: Underwatering Despite Neighbor's Sprinkler
Copyright © www.100flowers.win Botanic Garden All Rights Reserved